A sadistic prisoner fantasised about dismembering his victims and pulling out their internal organs before luring an intellectually disabled inmate to his death.

However, a coroner has found corrective services officers could not have predicted Carl William Sedgwick Bloomfield's murderous plan.

Duke Allan Wayne Schafer was serving a three-year term in the Woodford Correctional Centre, north of Brisbane, for drug trafficking, supply of weapons and threats to kill.

Despite being intellectually disabled, Mr Schafer was placed in an overcrowded prison where 55 inmates were housed in a unit intended for a maximum of 35.

Considered a "prisoner of concern", Mr Schafer was housed along with Bloomfield, a career criminal who was known to have violent thoughts and fantasies.

"His thoughts escal

See Full Page